Display lamp



D I S PLAY LAMP Filed March 27, 1948 v 2 Sheets-Sheet 1 INVENTOR.

m My? Dec. 14, 1948. N. CHIRELSTEIN D I S PLAY LAMP 2 Sheets-Sheet 2Fild March 27,1948

497m? dw/a-u STE/N J N VEN TOR Patented Dec. 14, 1948 iT'ED STAES ENTQFFI'CE DISPLAY LAMP Nathan. Chirelstein, Maplewoocl, N. J.

Application March 27, 1948, Serial No. 17,512

1 4 Claims.

The invention disclosed in this patent application is alamp foroutlining, displaying or projecting designs of selected shapes.

General objects of the invention are to provide a lamp which will havethe design forming media on the inside of the lamp globe and permanentin character so as to last as. long as the lamp itself.

Particular objects of the invention are to produce such a lamp atlowcostv and by simple manufacturing methods.

Special objects of the invention are to provide simple means and methodby which lamps may be produced for all sorts of advertising, decorating,signaling and other purposes and by which any portions of the lamp-globemay be utilized to carry the desired designs, insignia or other forms ofmarking.

The foregoing and other desirable objects are attained by the novelfeatures of construction, combinations and arrangements described in thefollowing specification and broadly covered in the claims.

The drawings accompanying and forming part of the specificationillustrate certain present practical embodiments of the invention.Structure, however, may be modified and changed within the full intentof the invention as herein set forth and claimed.

Fig. l is a sid elevation of one of the lamps with the sign or design inan opaque outline surrounded by light and with the end portion of thelamp broken away and appearing in section;

Fig. 2 is an end View of the lamp;

Fig. 3 is a sectional view of the lamp globe with the design formingstencil centered in the end of the same and with broken lines showinghow this stencil may be rolled to enter it through the narrow neckportion of the globe;

Fig. l is a perspective view of the stencil or masking element Fig. 5 isa broken and part sectional view illustrating a form of the invention inwhich the design is outlined in light and showing a form of springtake-up inserted in the socket back of the lamp, enabling the lamp to beturned to-line'up the sign horizontally or otherwise directed asrequired;

Fig. 6 is an end View of the lamp;

Figs. 7 and 8 are plan and part sectional side views,.respectively, ofthe spring contact adapter;

Fig. 9 is a perspective view of the mask used to produce the designappearing in Fig. 6.

The lam shown in Figs. 1 and 2 is of the reflector type having analuminum, silver or other reflective coating in on the inner wall of thelobe I i.

Thi inside coating is usually applied by flashin an aluminum wire in theglobe during process of manufacture. A feature of the present inventionis the utilizing of this flashing step to apply a desired design oroutline over the end or any other'selected portion of the lamp globe.

Figs. 3 and 4 show how this may be accomplished by using a stencil l2having theselected design l3 cut therein.

This" stencil member is flexible so that it may be rolled, as indicatedat la in Fig. 3, to insert it in through the narrow neck portion M ofthe globe and so that it will unroll, flatten out and lay in closefitting engagement over the broadened and more or less fiat end wall [5of the globe.

At the time this stencil'is inserted the neck of the globe isfully openso that, if necessary, a pusher or flattening-out tool may be inserted.to fully unroll and smooth the stencil into the necessary clos fittingengagement with the inner surface of the globe.

After the stencil element hasbeen inserted and properly located the.globe may be flashed in the usual way, producing in this particular casea reflective coating i8 onthe inner surface of the globe; interrupted bya circular, clear space it and opaque letters is of the reflectormaterial at the center of the clear space, all in conformity with thparticular stencil or mask.

With this particular embodiment of the invention the letters forming thedesign will appear dark in a brightly illuminated. field.

This arrangement may be reversed. by having the letters or otherelements of the design appear as brightly illuminated objects eitherwith or without an illuminated field or background. Thus in theembodiment shown in Figs. 5 and 6, the letters l9. forming the designappear in bright illumination in a dark or opaque background 2?? formedby the inside reflective coating 21 of the lamp globe.

This produces a particularly brilliantly illuminated sign or designsince all the light emitted from thelamp and collected by the totalinternalirefiecting. surface'is centered on the design, forming the onlylight outlet.

Fig. 9 shows how in such a case the mask or stencil element 22 is anopaque element shaped to the light design which it is desired toproduce, flexible so that it may be rolled or reduced in sire to enterthe neck of the globe and such that it will spread out and lay flatagainst the end wall of the lamp.

While various materials may be used for the stencil, mask or shield,Silicone rubber and asbestos and Silicone rubber impregnated with fibreglass hav been found suited to this purpose. If desired, fibre,cardboard or paper may be used, being discarded if too badly scorchedafter a single use or possibly after use several times.

The Silicone rubber has a tendency to cling to the glass and will lastmore or less indefinitely and thusis considered as having advantagesover other materials. This factor of clinging to the glass isparticularly advantageous where it may be desired to locate andtemporarily hold the stencil or shield in place over some other than theflattened end portion of the globe, for example over the inclinedflaring side wall portions 23 or the large diameter curved wall portions24, Fig. 3.

Instead of being simply flat, the masking element may be molded orshaped to fit the exact contour of that portion of the globe which is tocarry the design, it being in the contemplation of the invention thatthe design may be imprinted in the manner disclosed on any portion ofthe inner wall of the globe;

To enable the lamp being turned in a fixed socket to a, position where aname, sign or other indicia will read properly, a spring contactor maybe placed in the socket in backof the lamp where it will yield toturning movement of the lamp and provide necessary connection with thelamp turned to the proper position. Such an adapter or yieldableconnector is shown in Figs. '7 and 8, consisting of a coiled spring 25having a terminal 26 at one end for engagement with the center socketterminal 21, and a terminal 28 at the opposite end for engagement bythelamp terminal 29, the outer rim of the spring being protected atopposite ends by insulating discs 30, 3!, small enough to freely enterthe socket but large enough to prevent the spring from slipping sidewaysinto engagement with the side terminal 32 of the socket.

In use this yieldable connector may be simply dropped into the socketahead of the lamp and then the lamp screwed inward to make contact andturned beyond that to the point where the reading matter or design is inthe desired reading or display relation.

The invention is of broad scope, providing an inexpensive method ofmanufacturing lamps for various advertising, signal or display purposes.Names, symbols, greetings, signs and the like are readily produced bysimply providing the appropriately outlined masks and then flashing thelamp globes with such masks, to form the corresponding permanent lightdesigns in the lamp globes.

By designs it is intended to include any and all shapes such, forexample, as might be produced by a mask having just a small opening forproducing a concentrated spot of light.

It is contemplated also that a magnifying lens might be incorporated inthe lamp, supported between the filament or light source and thestenciled design to effect a magnified projection of the design. Themask, as particularly shown in Fig. 9, may be made up of continuouslyconnected characters indirectly readable, instead of the reverse designusually required in making stencils.

The marking of the lamp is permanent in character, enabling the lamp tobe cleaned or treated in any way without possibility of injuring thedesign. Also, this construction permits the globe to be tinted, coloredor otherwise treated to enhance or vary the display in any way.

What is claimed is:

1. The herein disclosed method of manufacturing a display lampcomprising inserting a mask carrying the delineation of the desireddesign in a folded condition through the restricted neck of a lampglobe, unfolding the mask within the globe and spreading the same inclose-fitting engagement with the inner surface of the globe and thenflashing the interior of the globe with said mask in the unfoldedcondition and thereby coating the inner surface of the globe withreflective material outlining the character depicted by the mask.

2. The herein disclosed method of manufacturing a display lampcomprising providing a mask of continuously connected characters,placing the same against the inner surface of a lamp globe, flashing theglobe with the mask in place with a coating material and then removinthe mask to leave the interior of the globe coated except for thosecontinuously connected portions covered by the mask.

3. The herein disclosed method of manufacturing a display lampcomprising providing a stencil of sheet material of a character whichwill temporarily cling to the inner surface of a lamp globe,sufiiciently fireproof to stand the heat generated in flashing ametallic vapor lamp coating, flexible enough to conform to the curvatureof a lamp globe and shaped to delineate a desired design, inserting saidstencil in the lamp globe and smoothing it into temporarily adheredengagement with a selected portion of the inner surface of a lamp globe,flashing the interior of the globe with a metallic reflective coatingwhile said stencil is in place to coat the inner surface of the globeexcept for those portions covered by the stencil and then bodilyremoving the stencil to leave the interior of the lamp covered with arefiective coating carrying the design delineated by the stencil.

4. A step article of manufacture comprising a lamp globe open at thestem end and having a stencil of flexible fire-resisting sheet materialof a character to cling to the surface of the globe and cut to delineatea desired design, temporarily adhered to a selected portion of the innersurface of the globe, preparatory to coating the inner surface of theglobe.

NATHAN CFJRELSTEIN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 576,266 Green Feb. 2, 18971,147,532 Morris July 20, 1915 1,761,344 Huber June 3, 1930 1,798,745Lyman Mar. 31, 1931 1,824,429 Goss Sept. 22, 1931 2,151,649 Birdseye etal Mar. 21, 1939 2,221,629 Birdseye Nov. 12, 1940

